Ill 100 over Otter Creek
Jersey County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ill 100 over Otter Creek in Jersey County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1938 and reconstructed in 1982, making it 87 years old at the 2025 inventory.
- It carries about 950 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 64 of the 113 inventoried bridges in Jersey County rated good (56.6%); 6 (5.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated November 2023, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (39.07574, -90.55599)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 272 ft |
| Location | 2.3 M S Jct Ill 16 |
| NBI structure number | 042001200000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Jersey County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 67 SB over Piasa Creek | 2012 | 12,100 | Good |
| US 67 NB over Piasa Creek | 2012 | 12,100 | Good |
| US 67 over De Arcy Creek | 1921 | 5,300 | Fair |
| Il 100 (NB) over Piasa Creek | 1997 | 5,150 | Fair |
| Ill 100 (SB) over Piasa Creek | 1997 | 5,150 | Good |
| Ill 100 over Elsah Creek | 1961 | 4,150 | Poor |
All bridges nearby: Jersey County, IL bridge conditions · every bridge in Jersey County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.